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Lina20 [59]
3 years ago
5

The distance time graphs for two objects are shown below: look at the picture. Which statement is true? Both objects move at var

iable speeds. Both objects move at a constant speed. Object A is moving at constant speed but Object B is moving at variable speed. Object A is moving at variable speed but Object B is moving at constant speed.
Can you get this done before 10:40 pls

Chemistry
1 answer:
mote1985 [20]3 years ago
4 0

Answer:

The last statement is correct

Explanation:

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Zeros that act as are not significant
GaryK [48]

Explanation:

non zeores digits always significant any zero between two significant digits are significant a final zeros in the decimal portion only are significant

6 0
3 years ago
To make a 0.500 M solution, one could take 0.500 moles of solute and add Group of answer choices enough solvent to make 1.00 kg
Fiesta28 [93]

<u>Answer:</u> The correct option is enough solvent to make 1.00 L of solution

<u>Explanation:</u>

A solution consists of solute and solvent. A solute is defined as the component present in a smaller proportion while the solvent is defined as the component that is present in a larger proportion.

Molarity is defined as the amount of solute expressed in the number of moles present per liter of solution. The units of molarity are mol/L. The formula used to calculate molarity:

Molarity=\frac{Moles}{Volume} .......(1)

We are given:

Molarity of solution = 0.500 M

Moles of solute = 0.500 moles

Putting values in equation 1, we get:

0.500mol/L=\frac{0.500mol}{\text{Volume of solution}}\\\\\text{Volume of solution}=\frac{0.500mol}{0.500mol/L}=1.00L

Hence, the correct option is enough solvent to make 1.00 L of solution

5 0
3 years ago
1. How many calcium atoms are in 8CaOH?
Vedmedyk [2.9K]

Answer:

8

Explanation:

the number before the abbrviation for calcium (Ca) shows how many calcium there is.

6 0
3 years ago
Read 2 more answers
You notice that your sample begins to boil at 96.20C and the liquid begins to drip into
Fantom [35]
Bend ss so think what’s hallienring is that tray okay Whitley
5 0
3 years ago
Write the balanced net ionic equation for the reactions that occur when the given aqueous solutions are mixed. Include the physi
Anestetic [448]

Answer:

a. 2 H⁺ (aq) + 2 OH⁻ (aq) → 2H₂O(l)

b. Pb²⁺(aq) + 2I⁻(aq) → PbI₂(s)

Explanation:

First of all, we must determine if the reactants produce precipitates:

A. HNO₃, Ca(OH)₂

B. Pb(NO₃)₂, KI

A. This is a neutralization reaction:

Acid + Base → Water and Salt

The net ionic equation shows, that water is produced

We dissociate the compounds:

HNO₃  →  H⁺(aq)  +  NO₃⁻(aq)

Ca(OH)₂(aq) → Ca²⁺(aq) + 2OH⁻(aq)

Ionic complete equation:

2H⁺(aq) + 2NO₃⁻(aq)  +  Ca²⁺(aq) + 2OH⁻(aq) → Ca²⁺(aq) + 2NO₃⁻(aq) + H₂O(l)

Net ionic equation:   2 H⁺ (aq) + 2 OH⁻ (aq) → H₂O(l)

B. Pb(NO₃)₂, KI

We dissociate: Pb(NO₃)₂ (aq) →  Pb²⁺(aq) + 2NO₃⁻(aq)

KI(aq) →  K⁺(aq) + I⁻(aq)

Salts from nitrate are soluble but, when the iodide reacts, it can make a lead iodide precipitate

Ionic complete equation:

Pb²⁺(aq) + 2NO₃⁻(aq)  +  K⁺(aq) + 2I⁻(aq) → K⁺(aq) + 2NO₃⁻(aq) +PbI₂(s)

Net ionic equation: Pb²⁺(aq) + 2I⁻(aq) → PbI₂(s)

We cancel the repeated ions

7 0
3 years ago
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